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Sizing Pump for Hot Water Radiators.
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JStar
Member Posts: 2,752
How do you figure your head pressure for a system with all converted hot water radiators?
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Pressure drop
If they are old-style column-type radiators, the pressure drop is minimal since the passageways are large.
Figure your pressure drop through your boiler and piping and then add a couple of feet of head.8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
Here's an article that may help
especially if this is a converted gravity system:
http://www.heatinghelp.com/article/11/Hot-Tech-Tips/238/Sizing-Circulators-for-Hot-Water-Heating-SystemsAll Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting0
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